1 In Windows 10, the key combination WindowsKey+PrntScrn sends a png picture of your screen to your Screenshots folder. When this happens, the screen momentarily dims slightly to tell you that you are doing it. If your PrntScrn key has two jobs then you may need to press the Fn key as well -> Fn-WinKey-PrntScrn.
Wiktionary (5.00 / 10 votes) Rate this definition: petroleum (Noun). A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under earth surface. Origin: From petroleum, from petra + oleum.
Petroleum and natural gas are nonrenewable sources of energy. Petroleum is a liquid mixture found underground that can be used to make gasoline, diesel fuel, and many other products. Petroleum is also called crude oil or oil. Natural gas is a mixture of gases â mostly methane. Natural gas is sometimes just called gas.